Richard Stevens, the artist behind Diesel Sweeties recently was served with a "Cease and Desist" order from Lucasfilm, regarding some of his Star Wars themed T-shirts. I have one of his "Gonk Droid had a Posse" shirts, and have been eying the "Space Demon From Beyond Pluto" shirt as well.
The shirts in question still seem to be available here: http://www.dieselsweeties.com/shirts/geekshirts.shtml
Get them before they are gone.
In a pseudo-protest Richard made a lovely "Cease and Desist" shirt. It speaks volumes.